Lowering device for large cartridges



Oct, 23, 1945. T. DOVE, JR

LOWERING DEVICE FOR LARGE CARTRIDGES Filed Jan. 27, 1943 INVENTOR f EVO/745 @0l/f', c/,

ATTORE patente TNT FEQE` LOWERBIG DEVICE FOR LARGE CR'EGIES Dove, lir., Pottsvlle, Pa., assignor to American Cyanamid & Chemical Corporation, New York, N. Y., a corporation of Delaware Application January 27, isis, serial No; 473,715

2 claims. (ci. 1oz-22) The present invention relates to a device for wrapper of multi-ply paper, which may be more and method of lowering cartridges into drill or or less readily penetrated. shotholes. I 'Ihe cartridge may be provided with a usual It frequently becomes necessary to lower packtype of electric blasting cap (not shown) images of explosives of comparatively large size and 5 bedded in the cartridge itself, from which a pair weight into drill holes of considerable depth, of lead wires 3 extend to a standard type of blastwhere the weight of the cartridge is such that a ing machine. separate lowering device is required. An elongated rod is shown at i of a diameter For a given eld of operations it may be necessmall enough t permit easy penetration of the sary to use e large number of cartridges, and lo cartridge and having a pointed end 5 to facilihence it is highly desirable that the lowering detate passage therethrough. The IOd iS Provided vice be of a type which can be used more than With an eye 5 al? 011e end, t0 Which iS Secured once. a ring l for attachment to a lowering rope t or 'I'he principal objects of the present invention, the likethereiore, are to provide a, lowering device which The lower end of the rod t is perforated to reis not expandable, which is of e. simple construc- Ceive a Small Wooden skewer 9- tion and which may be readily and quickly at- It is preferable that the metal parts beimade tached to the package to be lowered, of brass or the like, in order to avoid any acci- To this end the invention contemplates, in one dental Spark. of its aspects, an elongated rod having an eye ai; The parts are assembled as shown in the ligure, one end for attachment to a rope or the like, at the top of the hole, and then lowered by means the rod having a pointed end. adapted to peneof the rope 8, until the assembly occupies subtrate through the cartridge, the rod being of a, stantially the position shown at the bottom of length to project through the lower side thereof. the 1101e- A Sharp jerk is then given t0 the rope The projecting end of the red is perforated and 8, which has the effect of breaking the skewer 9 adapted to receive e. small, breekable skewer cf and permitting Withdrawal of the rod t to the wood or the like, upon which the cartridge nor- JOD 0f the hole- The Operatn 1S repeated as mally relies for support. Often 8S required.

In use, the above assembly is lowered into the While the practice of the above method inshot hole by means of the rope or the like, and volves penetratlon 0f the package by the rod. when it has reached the bottomI the rope is given which might cause leakage of moisture into the a sharp jerk which breaks the wooden skewer explosive in the event there .rr water in the shot and a110ws the pointed rod to be Withdrawn from hole, yet this is of no moment in cases where the the cartridge, The rod may then be. pulled up explosive composition itself is not of a watercui of the hele, and che operation repeated. it soluble nature, such as for instance in the case being only necessary to provide a supply of wood With gelatine dynamis 0I' the like.

. skewers While the invention has been described with The inventinn further-consists in the novel reference to a specific embodiment, it is to be combination. construction and arrangement of understood that it S not t0 be theTetO, pms and the steps of the method, more muy but is to be construed broadly and restricted hereinafter described and shown in the accom- SOlely by the SCODe of the appended claims.

panying drawing, in which: What is claimed is: v

The iigure is a perspective view showing an as- 1. In combination an explosive package, an sembly arranged according to the present inven.. elongated rod penetrating the same, the end'of tion, in place at the bottom cf a, snot noie. which projects through the package. the project- Referring new with partieuiarity to the eming end of the rod being perforated, a breakable bodiment illustrated, the walls of a. shot hole skewer in the perforated end of the rod. and a are shown at l, into which a cartridge or exlowering device attached to the opposite end of plosive package is to be lowered. the rod.

The cartridge itself is shown at 2 and may be 50 2. The combination of claim 1, in which the of any desired size, usually in the neighborhood skewer is of wood. of 5" x 80" and weighing several pounds. Such cartridges are usually provided with an outer THOMAS DOVE, Jn, 

